25-01 c

1 files changed, 15 insertions, 2 deletions

diff --git a/2025/01/c.c b/2025/01/c.c
index 44b9c78..115ea13 100644
--- a/2025/01/c.c
+++ b/2025/01/c.c
@@ -1,6 +1,19 @@
 #include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
 
-int main() {
-	printf("hello world!\n");
+int main()
+{
+	char dir;
+	int64_t n;
+	int64_t p = 50;
+	int64_t p1 = 0, p2 = 0;
+	while (scanf("%c%ld ", &dir, &n) == 2) {
+		int64_t new = p + (dir == 'R' ? n : -n);
+		p2 += labs(new) / 100 + (p != 0 && new <= 0);
+		p = (p = new % 100) >= 0 ? p : p + 100;
+		p1 += p == 0;
+	}
+	printf("silver: %ld\ngold: %ld", p1, p2);
 	return 0;
 }